Safety device for locks



April 17, 1928. 1,665,542 r s. SCALLY SAFETY DEVICE FOR LOCKS Filed NOV. 18, 1926 Ill 272 #972 (or 7 1% l y insuring against the"'unauthorized i nlock- My improved safetyde'vice comprises amain moved lengthwise into the? loekthroiigh the at 7 anc'18- at points'spaced-apart a distance- Patented Apr. 17, 1 9 2 8. Y 1 v I" I. UNITED I A enonen sostpygoj CHICAGO, ;ILLIN OI S. i

:S'A'FETY nnvicn ron o'cxs} Applitiatioi filed November s, 1 192 seria' itoi 149,612.

' The lock that is Operated with a common inatelyon line 3'3 otFig. 1 Fig. 4'is a 7 key can easily be'opened by unauthorized View of: a; fragment of the look easing or persons. Itthe lock beongthe door-of a escutcheon plate, containing the key hole, 7

roorn andthe key be left inthe lock-on the showing the main member of the safety de- 5 inner side of the door,- thekey may either 'viee'entering the 'key' hole and Fig. 5 is a hegpushed out of the 'loclgoi- I it may"be view-similar to :Fig. 4,.sh0wing'the .m'ain gripped in suitablepli'ers and turned from member of the safetydevice dropped down the ontsi'de; sothat'.the' preseneeof thekey in the 5ke' 'y-hole;- Fig. 6 is an enlarged dei'n't he; lock is. not a safeguard agai'nst'nn t ilfof "thebut'er end: of the safety device; 10 authorized unloeking from the opposite s de and Fig. Tie a sect-iontaken approximately otthe door or the *like. on line 7+7 10f Fig; 6; v

Iheobjeetlof he present invent-ionis" to Referring to the draw1ng,'1 represents'a produce a sin'rple'and compact device, that look casinghaving-parallel side\va1ls 2} and w maygbe inadeataflow ch stffor effectively 3"cohtaining registeringkeyhole slots t;

ingot. aloe of a eertain type when inydm body member and a locking bolt? The-main prov dldeviee is appliedftheretof ineinber consistls olfajshank'fisimilar'to'the I L "earrying outiny ifnvention l employ-fa steniof the keyfor the lock; there being-a mainlmemherlsomewhat 's i'milar to a door 'longnarrow-wing '6-on oneslde'ofthefistem 20 biit' having the wing partshorter'inithe atone end. This wing is not'as deepy thaft'is dimension at right angles tp tl e shank; oi' aswide as the bolt operating" wing on the the, member thn 1s thef-correspondlng key, but it is preferably made aslong as diniension 'o'f the key for p ening'fth'e lock. orlongerthanthe'thickne'ss otjthe look 'as Theshankgisiso' constrncted that it may be a whole. The shank; "is notehed,"as-indicated large end 'ofthe keyfh'ole. and, when is-h'a's equal to that between thelwalls 2" ai1d 3 of beenmoved-in the proper distance; may drop the lock casing the purpose of these notches down'finto "themarrow poi'tion of h k y being to reduce the thicknessfo'f the stein hole slotahd he'in't erlooked with thew-ans f at twopoint's, thatwhenfthese-point a 30 of the, lock 7 eas ing against endwis'e" movebrought'into regi'stration with"the two' side ment'. ,"Afte'r the saifetyflneinber'ihas been wallsfofthelock casing,- the "sh'ank"orstein (insertedfin'the lo ckpagnard'ldevice 'is in} can dropdownfiinto thenarrow portions-of I seitedaho've thefsa rneinthe large end of the the key-holes andibecomeinterlocked' with ,l zeyhole,to preventtheliftingofthe'safety the leek'casing againstend ise ovement. 35 deyiee; ,Th'is 1g11ard member} is; associated The wingfi of conrs preve'nts" he safety dewith the-safety device in snehamannerthat 'vice from bei'iig 'rotatedk it may freelybejmov ed Ibetween mwoi'kifig Cooperating with the main me lnber 'of the V "positienand anjidlejposition and, 'Wh'enin 's'a fetyadeviceis" a fholt"Qthat is adapted to 4 01'against being pushed'orfd'iven out of 'thje holes prevent the othijmember 'x from filk yh l r m t r pposi i s i ed p Th m y p e The various features ofhovelt y "wheieby attached td the shank or'st'em -d by a I my i nyenti'onf is eharaeterized"will, here'inl'sjiiita'ble clip lO bent'aroli nd bothf of these v 5 1535 b i it ddut'wit-h particularity in'the "members permitting'relativerotary "and 45 f. laims; bi1tjfor 'a fiillundetstanding offmy endwise movements between tl'ieflIQ-S Olne inv nt n n of s;g. bi.e ;t rad.advan e means ;-m t evp iv u referen ce may; be t "the lowing .de "at'ithorized rotation or endwise movement of tailed description tak' i1 eonneetionfw th "theholt'9. 'Infthe-arrangementishowm the the aeco npanyingvdgawing, whereinf steiir or sh'ank -5' ha's at oneiend a ahead '11 50 Figure 1- isavmmi section through a 1n the formof an eye'or ring open directly door having a set-in look, any improved opposite the end of the stem or shank The safety device being shown as applied to the locking bolt has a head flattened n one look, the catch or guard being in its idle or d rection and elongated-1n the direction at release position; Fig. 2 is a view similar to right angles thereto; the parts being so pro- 55 Fig. 1,' showing the safety device locked in portroned that when the head on the locking place; Fig. 3 is a section taken BJPPIOXP .bolt' is turned so as to bring its long dimensafety device is to be applied to or removed from the lock, the bolt is turned about its long axis through an angle of ninety degrees from the position shown in Figs. 2 and 6, namely into the angular position shown in Fig. 1, whereby the bolt becomes free to be moved endwise.

The entry of the head on the locking bolt into the notch in thehead or ring on the safety element prevents endwise movements of the locking bolt, but does not prevent The bolt can be locked rotary movements.

against rotary movements in any suitable way, conveniently by loosely securing in the eye 11 an eyelet 13 whose flanges extend radially far enough to overlap the ends of the head 12 on the locking bolt when the latter is in its locking position. At least one of the flanges of the eyelet is cut away to form a notch 14 through which, when it is brought in registration with the notch or openin through the side of the eye 11, the

head a? the locking boltmay freely swing.

It will be seen that my invention consists of a small device that may be carried about on ones keyring in the same way as a key and, at night or at other times, in a hotel room or elsewhere, the device may quickly be applied to the key hole of the door and positively insure against unlocking of the door from the outside.

While I have illustrated and described with particularity only a single preferred form of my invention, I do not desire to be limited to the exact structural details thus illustrated and described; but intend to cover all forms and arrangements which come within the definitions of my invention constituting the appended claims.

Iclaim;

1. A device of the character described comprising a stem having a long narrow radial wing at one end, said stem being grooved at two points distributed along said wing a distance equal to the thickness of a lock casing, to permit the stem to drop down into the narrow portions of thekey hole slots in the casing after being inserted in the large ends of the slots, and a guard member adapted to overlie the stem within the large ends of the key holes, and means for detachably Iocking said guard member and stem together.

cation.

eyelet in said eye having in one side a notch adapted to register with the gap in'the eye, a bolt lying beside said stem and having a head adapted to extend into said gap in one angular position of the bolt and'to clear the gap in another angular position, a clip securing said stem and-said bolttogether, a long narrow wing on one side of the stem at the opposite end, and there being transverse notches cut into'said. stem opposite the said wing at a distance apart equal to thethickness of a lock casing.

4. A device comprisingv two members 0 adapted to be inserted, one above the other, into a keyhole to fill the same, one of the members having parts interlocking-with the element in which the keyhole is located to prevent withdrawl of that member, the second member being mounted on the first meniber so as to be slidable lengthwise thereof and rotatable about is long axis thereon, the second member having at its outer end a head, and a locking dog onthe first member adapted to engage with said head and prevent relative movements between said members.

5. A device comprising two 'members adapted to be inserted, one above the'other,

into a keyhole to fill the same, one ofthe members having parts interlocking with the element in which the keyhole 'is located to prevent withdrawl of thatmember, the'second member being mounted on the first member so as to be slidable lengthwise thereof and rotatable about its long axis thereon, the second member having at its outer end a head, the first member having a recess to receive said head when the second member is rotated while in a working position and prevent relative lengthwise movements between said members, and a dog on the first.

member in positionv to lock said head against rotation out of the recess. 7 V In testimony whereof, I sign this specifi- GEORGE SCALLY. 

